Term: Case Mix Groups (CMG™)

Glossary Definition

Last Updated: 2009-04-09

Definition:

A Canadian patient classification system developed by the Canadian Institute for Health Information (CIHI), based on most responsible diagnosis, used to group and describe types of inpatients discharged from acute care hospitals. Each patient case is initially assigned to one of 25 mutually exclusive major clinical categories (MCC), which are based on body systems (e.g., circulatory, respiratory), then further classified as medical or surgical, and finally the CMG is assigned to create homogeneous groups. Cases within the same CMG are subsequently assigned to typical or atypical categories, and classified according to age group and complexity level.

Related concepts 

• Calculating Hospital Costs Using Cost Per Weighted Case (CPWC) / Cost of a Standard Hospital Stay (CSHS) Values
• Case Mix Groups (CMG™) - Overview
• Case Mix Groups (CMGs™) versus Diagnosis Related Groups (DRGs™)
• Hospital Costing: Using the 2009 Cost List for Manitoba Hospital Services
• Hospital Costing: Using the National Health Expenditure (NHEX) Database

Related terms 

• Atypical Patient
• Atypical Stay
• Canadian Institute for Health Information (CIHI)
• Case Mix
• Case Mix Groups with Complexity Overlay (CMG Plx™)
• Case Payment
• Case Weight Development
• Day Procedure Groups (DPG™)
• Death in Low Mortality Medical CMGs
• Death in Low Mortality Surgical CMGs
• Diagnosis Related Group (DRG™)
• Discharge Abstract Database (DAD)
• Expected Length Of Stay (ELOS)
• Factors Associated With Readmission
• Hospital Medical Records Institute (HMRI)
• Medical Separation
• Medical Service Type
• Outpatient Surgical Care
• Pregnancy and Birth Service Type
• Refined Diagnosis Related Groups (RDRG®)
• Relative Weights
• Resource Intensity Weights (RIW™)
• Service Type - In Hospital
• Surgical Service Type
• Typical Patient
• Typical Stay

Links 

• CIHI Web Site - Case Mix Groups (CMG[tm])

References 

• Finlayson G, Reimer J, Dahl M, Stargardter M, McGowan K. The Direct Cost of Hospitalizations in Manitoba, 2005/06. Winnipeg, MB: Manitoba Centre for Health Policy, 2009. [Report] [Summary] [Additional Materials] (View)

Term used in 

• Black C, Frohlich N. Hospital Funding within the Health Care System: Moving Towards Effectiveness (Report #91-05-02). Winnipeg, MB: Manitoba Centre for Health Policy and Evaluation, 1991. [Report] (View)
• Bruce S, Prior H, Katz A, Taylor M, Latosinsky S, Martens P, De Coster C, Brownell M, Soodeen R, Steinbach C. Application of Patient Safety Indicators in Manitoba: A First Look. Winnipeg, MB: Manitoba Centre for Health Policy, 2006. [Report] [Summary] (View)
• Finlayson G, Roos NP, Jacobs P, Watson D. Using the Manitoba Hospital Management Information System: Comparing Average Cost Per Weighted Case and Financial Ratios of Manitoba Hospitals. The Next Step. Winnipeg, MB: Manitoba Centre for Health Policy and Evaluation, 2001. [Report] [Summary] (View)
• Fransoo R, Martens P, The Need to Know Team, Prior H, Burchill C, Koseva I, Bailly A, Allegro E. The 2013 RHA Indicators Atlas. Winnipeg, MB: Manitoba Centre for Health Policy, 2013. [Report] [Summary] [Additional Materials] (View)
• Fransoo R, Martens P, The Need to Know Team, Prior H, Burchill C, Koseva I, Rajotte L. Who is in our Hospitals.and why? Winnipeg, MB: Manitoba Centre for Health Policy, 2013. [Report] [Summary] [Additional Materials] (View)
• Garland A, Fransoo R, Olafson K, Ramsey C, Yogendran M, Chateau D, McGowan K. The Epidemiology and Outcomes of Critical Illness in Manitoba. Winnipeg, MB: Manitoba Centre for Health Policy, 2012. [Report] [Summary] (View)
• Shanahan M, Lloyd M, Roos NP, Brownell M. Hospital Case Mix Costing Project 1991/92. Winnipeg, MB: Manitoba Centre for Health Policy and Evaluation, 1994. [Report] (View)